v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Jul. 30, 2025
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-34726  
Entity Registrant Name LYONDELLBASELL INDUSTRIES N.V.  
Entity Incorporation, State or Country Code P7  
Entity Tax Identification Number 98-0646235  
Entity Address, Address Line One 2800 Post Oak Blvd.  
Entity Address, Address Line Two Suite 5100  
Entity Address, City or Town Houston,  
Entity Address, State or Province TX  
Entity Address, Country US  
Entity Address, Postal Zip Code 77056  
City Area Code (713)  
Local Phone Number 309-7200  
Title of 12(b) Security Ordinary Shares, €0.04 Par Value  
Trading Symbol LYB  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   321,648,429
Entity Central Index Key 0001489393  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
United Kingdom    
Entity Information [Line Items]    
Entity Address, Address Line One 4th Floor, One Vine Street  
Entity Address, City or Town London  
Entity Address, Country GB  
Entity Address, Postal Zip Code W1J0AH  
Country Region +44 (0)  
City Area Code 207  
Local Phone Number 220 2600  
Netherlands    
Entity Information [Line Items]    
Entity Address, Address Line One Delftseplein 27E  
Entity Address, City or Town Rotterdam  
Entity Address, Country NL  
Entity Address, Postal Zip Code 3013AA  
Country Region +31 (0)  
City Area Code 10  
Local Phone Number 275 5500